Filter entire NSDictionaries out of NSArray based on multiple keys

Question

I have an NSArray of NSDictionary objects which I would like to be able to return a new array of NSDictionaries from, where every NSDictionary has \"Area == North\" (for exa

Answer 1

NSPredicate should work fine, I tried this:

NSMutableArray *a = [NSMutableArray array];
[a addObject:[NSDictionary dictionaryWithObjectsAndKeys:@"North", @"Area", @"North", @"Test", nil]];
[a addObject:[NSDictionary dictionaryWithObjectsAndKeys:@"South", @"Area", @"North", @"Test", nil]];
[a addObject:[NSDictionary dictionaryWithObjectsAndKeys:@"East", @"Area", @"North", @"Test", nil]];
NSPredicate *p = [NSPredicate predicateWithFormat:@"%K matches %@", @"Area", @"North"];
NSArray *newArray = [a filteredArrayUsingPredicate:p];
NSLog(@"newArray:%@", [newArray description]);

It works.